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Surface entanglement in quantum spin networks (CROSBI ID 266741)

Prilog u časopisu | ostalo | međunarodna recenzija

Zippilli, Stefano ; Giampaolo, Salvatore Marco ; Illuminati, Fabrizio Surface entanglement in quantum spin networks // Physical review. A, Atomic, molecular, and optical physics, 87 (2013), 4; 042304, 8. doi: 10.1103/PhysRevA.87.042304

Podaci o odgovornosti

Zippilli, Stefano ; Giampaolo, Salvatore Marco ; Illuminati, Fabrizio

engleski

Surface entanglement in quantum spin networks

We study the ground-state entanglement in systems of spins forming the boundary of a quantum spin network in arbitrary geometries and dimensionality. We show that as long as they are weakly coupled to the bulk of the network, the surface spins are strongly entangled, even when distant and not directly interacting, thereby generalizing the phenomenon of long-distance entanglement occurring in quantum spin chains. Depending on the structure of the couplings between surface and bulk spins, we discuss in detail how the patterns of surface entanglement can range from multipair bipartite to fully multipartite. In the context of quantum information and communication, these results find immediate application to the implementation of quantum routers, that is, devices able to distribute quantum correlations on demand among multiple network nodes.

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Podaci o izdanju

87 (4)

2013.

042304

8

objavljeno

1050-2947

1094-1622

10.1103/PhysRevA.87.042304

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Fizika

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